Resistors

Principles Of Technology

What are resistors?

A resistor is a device having a designed resistance to the passage of an electric current.
What is a resistor?

What does a resistor do in circuit?

Resistors are very vital components in any electrical circuits as they are used to direct the flow of current to certain parts of the circuit. Resistors are also.


Resistor's also deem the lightbulb in a circuit.

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Here are some pictures. & Video over the way the resistor code is used.

Resistor Color Code

More about resistors.

The resistors used in heating and lighting applications are almost exclusively metallic. Such materials as platinum, tungsten, and Nichrome (an alloy of nickel, iron, and chromium) are commonly used. A wire-wound resistor consists of a coil of wire made of Nichrome or a similar material wound on a ceramic core and covered with a protective ceramic material.

There are several types of resistors used in electronic circuits. A carbon resistor is made of carbon mixed with a binding material such as clay and molded into a cylinder. A film-type resistor is made of a thin film of carbon, metal, or metal oxide on a ceramic base. Resistors in integrated circuits typically consist of a thin layer of semiconductor material or a thin metallic film.

Resistors may be either fixed or variable. Variable resistors having two terminals are called rheostats; those having three terminals are called potentiometers.